2.2. Data acquisition
A monitoring campaign was conducted from 02 February to 29
June 2010 in order to reveal vertical and horizontal illuminances,
occupancy patterns, actual lighting use patterns by occupants, and
lighting energy consumption. External illuminance was measured
with LI-201SA. HOBO U12-012 was used for measuring internal
illuminance on the workplane, HOBO U09-001 for observing
occupancy patterns, and HOBO U09-002 for the use of electric
lighting.